2. Consider the illustration of a standard metric scale across the two lines. 51 6 7 8 9 10 a. Write a short definition of least count, and state what the least count is for this ruler. b. Show how to determine x, the distance between the two lines. Record data in mm. (See the illustration inside the manual.) Result: x = mm

Exam 1.pdf Exam 1 Q1: Which of the following is NOT an SI unit? b. kilogram c. second d. mile a. meter. Q2: Write these values as full decimal numbers (not using scientific notation), in standard SI units without any prefixes, preserving the number of significant figures. a) 630 us. b) 42400 km Q3: A football wide receiver starts from rest and runs straight forward 24.0 meters in 2.80 seconds at a constant acceleration. a) How large was his average velocity? b) How large was his acceleration, in m/s2? c) How long did it take for the wide receiver to travel the first 12.0 meters? Q4: A car is accelerated from rest to a velocity of 75 km/h over a distance of 2500 m. (a) How long did the acceleration last? (b) Calculate the acceleration. Q5: 1) Show that a is perpendicular to b when a =i+j+3k. b= 2i + 7i - 3k 2) Find the angle between c and d when c=i+ 2j + 3k. d = 2i + 4j – 3k

a) Km? b) mm? c) inches? fuel mileage of a certain car is 28 mpg (mi/gal). What is it in units of km/L? 013km. ) gal

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37. Calculate the circumference and area for the following circles. (Use the following formulas: circumference = 2™r and area = Tr2.) a. a circle of radius 3.5 cm b. a circle of radius 4.65 cm

Q23. The width of a man's hand was used as a common unit of length several hundred years ago. What are the advantages and disadvantages of using such a unit? Explain. E1. Suppose that a pancake recipe designed to feed three people calls for 600 mL of flour. How many milliliters of flour would you use if you wanted to extend the recipe to feed five people? E7. A crate has a mass of 9.40 kg (kilograms). What is this mass in grams? In milligrams?

Practice) a. To convert feet (ft) to meters (m), the number of feet should be multiplied by which of the following conversion factors? i. 1 m/3.28 ft ii. 3.28 ft/1 m b. To convert sq.in to sq.ft, the number of sq.in should be multiplied by which of the following conversion factors? i. 144 sq.in/1 sq.ft ii. 1 sq.ft/144 sq.in c. To convert sq.yd to sq.ft, the number of sq.yd should be multiplied by which of the following conversion factors? i. 1 sq.yd/9 sq.ft ii. 9 sq.ft/1 sq.yd 3. (Practice) Determine the final units of the following expression: 9.8m/s2 ×100cm/1m×1in/2.54cm×1ft/12in 4. (Practice) a. Determine the conversion factors that can be used to convert miles per gallon (mpg = mi/gal) to kilometers per liter (km/liter), given that 1 liter = 0.22 gallons and 1 kilometer = 0.6214 miles. b. Using the conversion factors you determined in Exercise 4a, convert 25 mpg into km/liter. 5. (Automotive) a. An automobile engine’s performance can be determined by monitoring its rotations per…

10 mL 9 24 mL 8 mL 7 Measuring Тool 25 mL 7 mL Volume, mass and/or length measurement (with units) Measuring Тol 8 cm 9 cm Volume, mass and/or length measurement (with units) Page 13 of 14

3. Perform the following calculations and report your answer to the correct number of significant figures. c. 1.0042 +0.00621 d. (9.187 x 0.182) 3.1

BEHAICE EVA MAC Hint 1 The following lengths are given in meters. Use metric prefixes to rewrite them so the numerical value is bigger than one but less than 1000. For example, 7.9 × 10-3 m can be written as 7.9 mm. a. 4.7 x 10° m = ? Answer all b. 0.054 m = ? point? C. 6.9 x 10 – 10 ? m = cter? d. 5.7 x 104 m = m/sona cortain day